No. 496:

I like mushrooms on my pizza. When I plan to make a pizza at home, I buy mushrooms. But sliced thinly, three mushrooms is plenty to cover a pizza, and you really don't want more because they release moisture during cooking and your pizza can go all soggy. And I don't use mushrooms in anything else, so I only need to buy three mushrooms. But I feel stupid buying just three mushrooms, so I always end up filling the bag and getting a couple dozen mushrooms. Much better! Except then I use three of them on my pizza, and don't make pizza again for a couple of weeks, and the mushrooms go funky and I throw them out. Then a month later I feel like making pizza again and buy another big bag of mushrooms, that I know I'll only ever use three of.